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- W2023491285 abstract "Abstract Phytoremediation of heavy‐metal‐contaminated soils can be an inexpensive means to remove hazardous metals from soil. Two metallophytes, Thlaspi caerulescents (J. & C. Presl, a Zn and Cd hyperaccumulator) from Prayon, Belgium, and a Zn‐tolerant ecotype of bladder campion [ Silene vulgaris (Moench.) Garcke L.] from Palmerton, PA, were compared with tomato [ Lycopersicon lycopersicum (L.) Karsten, metal intolerant] in nutrient solution to characterize Zn and Cd uptake and tolerance. Zinc and Cd were added to solutions at a 50:1 molar ratio to simulate concentrations often found on contaminated sites. Seven treatment concentrations were used, ranging (in half‐log increments) from 3.16 µ M Zn + 0.063 µ M Cd to 10000 µ M Zn + 200 µ M Cd. Thlaspi caerulescens showed much greater tolerance to Zn/Cd treatments than the other species, with toxicity stress only apparent at the 10000 µ M Zn/200 µ M Cd treatment. In this treatment, shoot concentrations of Zn and Cd were 33600 and 1140 mg kg −1 , respectively. Thlaspi caerulescens was also more effective at translocating both Zn and Cd from solution to shoots. Zinc concentration in shoots of T. caerulescens was higher than the other species at all Zn/Cd treatments. Cadmium concentration in shoots of T. caerulescens were significantly higher than in bladder campion only at the 316 µ M Zn/6.32 µ M Cd treatment. This genotype of T. caerulescens may not hyperaccumulate Cd. However, extreme Zn and Cd uptake and tolerance is evident in T. caerulescens , with >25000 mg Zn kg −1 and 1000 mg Cd kg −1 before yield is reduced. Results suggest that T. caerulescens may be a candidate for the phytoremediation of Zncontaminated soils." @default.
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- W2023491285 date "1995-01-01" @default.
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- W2023491285 title "Zinc and Cadmium Uptake by Hyperaccumulator Thlaspi caerulescens Grown in Nutrient Solution" @default.
- W2023491285 doi "https://doi.org/10.2136/sssaj1995.03615995005900010020x" @default.
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